This Attitude vape kit has Omni board that allows you to move with ease between nonchalant vaping, even offering bypass mode, and heavily customized settings to squeeze every bit of potential out of your builds. It can fire up to 80W of output. And it is just needed a single 18650 cell. The Estoc tank can be hold 2ml e-juice capacity and also can be enlarged to 4ml by using a adapter and glass tube, you can refill e-juice from top cap and it is very easy to refill. It also has bottom airflow adjustment, you can adjust the airflow holes as your preference. This tank comes with ECO Universal coil inside and revolutionary easy coil replacement system.